<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<link rel="stylesheet" href="test2.css">


<!-- <style>
    .box {
        width: 200px;
        height: 150px;
     }
    /* .red {
        background-color: red;
     }
    .green {
        background-color: green;
    } */
   </style> -->
<body>
    <!-- <style>
        p{
            color: red;
            /* 设置字体大小 */
            font-size: 30px;
        }
    </style> -->
<!-- 
    <p>随便写点什么东西</p>

    行内写法
    <p style="color:green; font-size:50px">css的行内写法</p>
    <p>哎呀哎呀</p>

       <div class="box"></div>
       <div class="box"></div>
       <div class="box"></div>

    
</body>
</html>